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' G. B'. BRAYTON.

Metallio Piston Rod Packing. N1o.235,733. Patented Dec. 21,1880.

N- PETERS. WWWWWWWWWWWWWWWWWWWWWWWWWWW C- UNii'inn STATES PATENT OFFI E.

GEORGE E. BRAYTON, OF BOSTON, MASS,- ASSIGNOR TO THE BRAYTON PETROLEUM ENGINE COMPANY, OF HARTFORD, CONN.

METALLIC PISTON-ROD PACKING.

SPECIFICATION forming part of Letters Patent No. 235,733, dated December 21, 1880,

' Application filed June 7, 1880. (No model.) i

To all whom it may concern:

Be it known that I, GEORGE B. BRAYTON, of Boston, in the county of Suffolk and State ofMassachusetts, have invented certain new and useful Improvements in Metallic Piston- Rod Packing; and I do hereby declare that the following specification, taken in connection with the drawings furnished and forming a part thereof, is a clear, true, and complete description of my invention.

My improved packing is specially intended for use with the piston-rods of such motors as involve combustion within the cylinder-as, for instance, such hydrocarbon-engines as have I 5 heretofore been patented by me-and my packin g belongs to that general class in which segmental sections, guide-blocks, and springs are employed.

The objects of my invention are to provide for good packing-contact; for uniformity in the dimensions and form of the segments, thereby attaining uniformity in wear and in the contraction and expansion of the segments; for a minimum number of radial joints between the segments consistent with good packing-contact and compensation for wear, and for such an arrangement of guide-blocks and springs with relation to the segments that the joints between the latter shall be well guarded 0 by the guide-blocks, and also so that each of the segments shallbe influenced by two guideblocks. Q

My invention consists, mainly, in a pistonpacking embodying in combination three me- 3 5 tallic segments of practically-uniform shape and dimensions and threespringguide-blocks each of which bear upon two of the packingsegments and guards theradial joint between their ends. Two or more complete series of the 0 segments and guide-blocks may be employed for packing one rod, in which case the segments of one series are so placed with reference to those of the next adjacent series that the radial joints in each series are respectively 5 located opposite the central portion of the segments of other series. I find, however, that good results are attainable if one series of the segments and blocks be employed in connection with a sectional ring, as hereinafter described.

To more particularly describe my invention,

I will refer to the accompanying drawings, in which- Figure 1 is a central sectional view of a por tion of a cylinder-head and its packing-box 5 5 containing my packing and a piston-rod. Fig.

2 is an end view of the same with the gland of the box removed. Fig. 3 is a view of a guide-block and spring detached.

The three packing-segments A are each constructed for packing-contact with about onethird of the periphery of the piston-rod, and they are all of exactly the same form and dime nsions, which enables them to be economically constructed, to wear with uniformity, 6 5 and to expand and contract alike when heated and cooled, as in daily use. Each segment at its ends is squared off on radial lines, and from thence to its outer side it is cut away on lines rectangular to the radial lines, which re- 0 sults in attaining a wedge-like form to each segment. When placed in working position the adjacent rectangular lines of each two segments are exactly coincident, and those portions of the segments afford an extensive bear- 7 5 in g-surface for the face of each guide-block B, which extends equally on both sides of the radial joint between the segments. I.

The three guide-blocks B are of equal size, form, and dimensions. They are perfectly straight on their faces, and their backs conform; in outline with the interior wall of the packing-box. Each guide-block has a fiat spring, a, secured to its outer side bya screw or rivet.

It will be seen that the springs of the guideblocks constantly induce an inward pressure of the segments against the piston-rod notwithstanding the fact that the line of contact between the blocks and segments is rectangu- 9o lar to the radial joints between the segments.

I am well aware that segments and spring guide-blocks have heretofore been combined in various ways in the construction of metallic packing; but I know of none in which three 5 segments and three blocks were so constructed and arranged that the segments encircled the piston-rod and each of the three segments was acted upon by two of the blocks, or in which each block acted equally upon two segments 10 for forcing them inward against the rod, nor in which the three segments were radially jointed and faced off at right angles to said radial joints" for contact with straight-faced guide-blocks.

In Fig. l, at O, I show, in section, an inner auxiliary packing composed of a plain ring out on radial lines into three parts of equal size, each of them being provided with a spring, I), at its back. In some extraordinary cases it may be advisable to also employ springs for each of the packingsegmentsA; but ordinarily the guide-block springs will only be required. The joints between these pieces of the auxiliary packing are sufficiently wide or open to admit of inward movement to compensate for Wear, and also to receive pins 0, projecting rearward from the packing-segments, as shown in Fig. 2, whereby their respective relations are securely maintained against any tendency ofeither of the parts to independently rotate on the rod within the box. As indicated in dotted lines in Fig. 2, the radial joints of the auxiliary packing-rin g are located equidistant between the joints of the main packing, and it will be seen that the joints between the guide- I blocks and their segments are Well guarded on one side by the plain surface of the auxiliary packing-ring, and on the other by the inner face of the gland d, all of which is conducive togood packing results at points other than immediately adjacent to the piston-rod.

I make no claim, broadly, to the auxiliary packing-ring; but said ring, in combination with the segments and guide-blocks, as desections radially jointed and faced off at right angles to said joints, the spring guide-blocks, and the auxiliary packing-ring, constructed in sections and provided with springs, substantially as described.

' GEO. B. BEAYTON.

WVitnesses :v

.TosEPH NroKERsoN, J. H. BODENBRAUN. 

